1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.upgrade.util;
24  
25  import com.liferay.portal.upgrade.StagnantRowException;
26  
27  import java.util.Iterator;
28  import java.util.LinkedHashMap;
29  import java.util.LinkedHashSet;
30  import java.util.Map;
31  import java.util.Set;
32  
33  /**
34   * <a href="MemoryValueMapper.java.html"><b><i>View Source</i></b></a>
35   *
36   * @author Alexander Chow
37   * @author Brian Wing Shun Chan
38   */
39  public class MemoryValueMapper implements ValueMapper {
40  
41      public MemoryValueMapper() {
42          this(new LinkedHashSet<Object>());
43      }
44  
45      public MemoryValueMapper(Set<Object> exceptions) {
46          _map = new LinkedHashMap<Object, Object>();
47          _exceptions = exceptions;
48      }
49  
50      public Object getNewValue(Object oldValue) throws Exception {
51          Object value = _map.get(oldValue);
52  
53          if (value == null) {
54              if (_exceptions.contains(oldValue)) {
55                  value = oldValue;
56              }
57              else {
58                  throw new StagnantRowException(String.valueOf(oldValue));
59              }
60          }
61  
62          return value;
63      }
64  
65      public void mapValue(Object oldValue, Object newValue) throws Exception {
66          _map.put(oldValue, newValue);
67      }
68  
69      public void appendException(Object exception) {
70          _exceptions.add(exception);
71      }
72  
73      public Iterator<Object> iterator() throws Exception {
74          return _map.keySet().iterator();
75      }
76  
77      public int size() throws Exception {
78          return _map.size();
79      }
80  
81      public Map<Object, Object> getMap() {
82          return _map;
83      }
84  
85      private Map<Object, Object> _map;
86      private Set<Object> _exceptions;
87  
88  }